Add Members

Add Members assigns one or more members without replacing the card’s current members.

Inputs

Input	Type	Required	Description
Third-party account	Trello account	Yes	An account with write access to the card.
Card ID or URL	String	Yes	A card ID, short link, or complete card URL.
Members	List of strings	Yes	Member IDs, usernames, or full names. Matching is case-insensitive.

Output	Type	Description
Card	Object	The card after the members are assigned.
Card ID	String	The updated card’s ID.

Member IDs take precedence over usernames, and usernames take precedence over full names.

A full name shared by multiple board members is ambiguous. Use a member ID or unique username instead.